CH169242A - Process for the preparation of 5-chloro-2-acetoacetylamino-1-methoxybenzene-3-sulfonic acid. - Google Patents

Process for the preparation of 5-chloro-2-acetoacetylamino-1-methoxybenzene-3-sulfonic acid.

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Publication number
CH169242A
CH169242A CH169242DA CH169242A CH 169242 A CH169242 A CH 169242A CH 169242D A CH169242D A CH 169242DA CH 169242 A CH169242 A CH 169242A
Authority
CH
Switzerland
Prior art keywords
chloro
acetoacetylamino
methoxybenzene
preparation
sulfonic acid
Prior art date
Application number
Other languages
German (de)
Inventor
Aktiengesellsc Farbenindustrie
Original Assignee
Ig Farbenindustrie Ag
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ig Farbenindustrie Ag filed Critical Ig Farbenindustrie Ag
Publication of CH169242A publication Critical patent/CH169242A/en

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  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Description

  

  Verfahren zur Herstellung von     5-Chlor-2-acetoacetylamino-l-methogybenzol-3-sulfosäure.       Es wurde gefunden, dass man     5-Chlor-          2-acetoacetyl-ami    n o-1-     inethoxybenzol-3-s        ulfo-          säure    dadurch erhalten kann, dass man     5-Chlor-          2-acetoacetylamino-l-methoxybenzolmit    einem  sulfonierenden Mittel behandelt.  



  <I>Beispiel:</I>  100     gr        5-Chlor-2-acetoacetylamino-l-meth-          oxybeiizol    werden unter Rühren bei 10 0 C       in        400        gr        Schwefelsäure        von        20%        Anhyd-          ridgehalt    eingetragen.

   Nachdem das     5-Chlor-          2-acetoacetylamino-l-methoxybenzol    gelöst  ist, rührt man noch einige Zeit, bis eine mit  Wasser verdünnte Probe beim Versetzen mit       Natriumcarbonatlösung    kein     5-Chlor-2-aceto-          acetylamino    -1-     methogybenzol    ausscheidet.  Dann giesst man auf Eis und saugt die aus  geschiedene 5 -Chlor- 2 -     acetoacetylamino    -1-         methoxybenzolsulfonsäure    ab.

   Die neue     5-          Chlor-    2 -     acetoacetylamino    -1-     methoxybenzol-          sulfonsäure    bildet gut kristallisierende Alkali  salze, die man aus Wasser     umkristallisieren     kann.



  Process for the preparation of 5-chloro-2-acetoacetylamino-1-methogybenzene-3-sulfonic acid. It has been found that 5-chloro-2-acetoacetyl-amin o-1-ynethoxybenzene-3-sulfonic acid can be obtained by treating 5-chloro-2-acetoacetylamino-1-methoxybenzene with a sulfonating agent.



  <I> Example: </I> 100 g of 5-chloro-2-acetoacetylamino-1-methoxybeiizole are introduced into 400 g of sulfuric acid with 20% anhydride content at 10 ° C. with stirring.

   After the 5-chloro-2-acetoacetylamino-1-methoxybenzene has dissolved, stirring is continued for some time until a sample diluted with water does not separate out 5-chloro-2-acetoacetylamino -1-methogybenzene when mixed with sodium carbonate solution. It is then poured onto ice and the separated 5-chloro-2-acetoacetylamino -1-methoxybenzenesulfonic acid is filtered off with suction.

   The new 5-chloro-2-acetoacetylamino -1-methoxybenzenesulfonic acid forms alkali salts which crystallize well and which can be recrystallized from water.

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung von 5-Chlor- 2 - acetoacetylamino-l- methoxybenzol - 3-su lfo- säure, dadurch gekennzeichnet, dass man 5-Chlor-2-acetoacetylamino-l-methoxybenzol mit einem sulfonierenden Mittel behandelt. Die neue Säure bildet gut kristallisierende Alkalisalze, die aus Wasser umkristallisiert werden können. PATENT CLAIM: Process for the preparation of 5-chloro-2-acetoacetylamino-1-methoxybenzene-3-su lfoic acid, characterized in that 5-chloro-2-acetoacetylamino-1-methoxybenzene is treated with a sulfonating agent. The new acid forms well-crystallizing alkali salts that can be recrystallized from water.
CH169242D 1931-12-14 1932-11-15 Process for the preparation of 5-chloro-2-acetoacetylamino-1-methoxybenzene-3-sulfonic acid. CH169242A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE169242X 1931-12-14
CH164838T 1932-11-15

Publications (1)

Publication Number Publication Date
CH169242A true CH169242A (en) 1934-05-15

Family

ID=25718055

Family Applications (1)

Application Number Title Priority Date Filing Date
CH169242D CH169242A (en) 1931-12-14 1932-11-15 Process for the preparation of 5-chloro-2-acetoacetylamino-1-methoxybenzene-3-sulfonic acid.

Country Status (1)

Country Link
CH (1) CH169242A (en)

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